In April 2015 the following datasheets were published on CABI’s Invasive Species Compendium (ISC). You can explore the open-access ISC here: www.cabi.org/isc.

Triumfetta semitriloba (burweed) – this weedy perennial shrub species, native to large parts of tropical and subtropical America, has been introduced to a number of Pacific islands, where it is now invasive. Its international spread is something of a mystery, though the barbed burs allow local spread via passing animals and people to occur very easily.

Stachys arvensis (staggerweed) – native to parts of Europe, Asia and North Africa, this poisonous herb has been introduced to a range of habitats around the world. S. arvensis has become a serious weed in many places, with negative environmental and economic impacts. It can cause nervous disorders in livestock, especially sheep, causing them to stagger – hence the common name staggerweed.

Solanum mammosum (nipplefruit nightshade) – known by a veritable smorgasbord of colourful names, S. mammosum is an annual or short-lived perennial that has been introduced to Asia, Africa, the Americas and Pacific islands. It is reported invasive in Cuba, the Philippines, Fiji, Tonga and parts of Hawaii.